Hello good people. My apologies if the answers I’m after are in a previous post but I have searched this forum and am struggling to find a definitive yes or no. I’m new to electronics, am learning as I go, and that little blue smoke dude, Sparky, seems very comfortable on my workbench. If there are answers elsewhere a gentle nudge in that direction would be welcomed.
I am working on a project involving measuring the color of two seperate single RGB LEDs and mimicking their colors on two seperate strings of analog RGB LEDs. Specifically the Adafruit RGB LED weatherproof flexi-strip - 30 LED/m PRODUCT ID: 285. I have a 2meter strip that I will split into two one meter strips.
The project is to take the electronics from a Disney Made With Magic ear hat, use two Adafruit RGB Color Sensor with IR filter and White LED - TCS34725 PRODUCT ID: 1334 to read the color of each ear, and display those colors with the LED strips which will be attached to a backpack for my wife. I have an Adafruit TCA9548A I2C Multiplexer PRODUCT ID: 2717 to handle addressing both TCS34725 color sensors.
I planned to handle the logic with an Adafruit Feather M0 Express - Designed for CircuitPython - ATSAMD21 Cortex M0 PRODUCT ID: 3403 powered with a 3.7v lipo battery, and power the LEDs separately with an 8xAA battery pack. Will I be ok with this setup or will I get into trouble with too low a signal voltage from the Feather into the 12v LEDs?
Thank you in advance for any advice you can provide.
Regards,
Daniel
Do analog RGB LEDs and Feather M0 Express play well together
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Please be positive and constructive with your questions and comments.
- onespeedonly
- Posts: 11
- Joined: Sun Jul 24, 2016 10:14 pm
- adafruit_support_carter
- Posts: 29168
- Joined: Tue Nov 29, 2016 2:45 pm
Re: Do analog RGB LEDs and Feather M0 Express play well toge
In general, this should work. The one key item you are not mentioning is a power transistor. Actually 3, one for each color channel. This is mentioned briefly on the product page:
https://learn.adafruit.com/rgb-led-strips/overview
And then you can control the transistors with the Feather in the same manner as the guide shows for an Arduino UNO.
This guide might also be useful:
https://learn.adafruit.com/pulse-room/overview
For more details about how to actually wire it all up, check out the guide:Use any NPN or N-channel MOSFET (although the big powerful kind is good for a large strip) and PWM the inputs for color-mixing.
https://learn.adafruit.com/rgb-led-strips/overview
And then you can control the transistors with the Feather in the same manner as the guide shows for an Arduino UNO.
This guide might also be useful:
https://learn.adafruit.com/pulse-room/overview
- onespeedonly
- Posts: 11
- Joined: Sun Jul 24, 2016 10:14 pm
Re: Do analog RGB LEDs and Feather M0 Express play well toge
Thank you adafruit_support_carter! I did forget to mention the MOSFETs. I do already have them. Thank you too for the links. I had seen the pulse room one before but had forgotten about it.
Thank you again,
Daniel
Thank you again,
Daniel
Please be positive and constructive with your questions and comments.